// 一星：https://iai.sh.cn/problem/806
#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  if (a + b + c != 180) {
    cout << "Error";
  } else if (a == b && b == c) {
    cout << "Equilateral";
  } else if ((a == b && a == 45) || (a == c && a == 45) || (b == c && b == 45)) {
    cout << "Isosceles right";
  } else if (a == b || b == c || a == c) {
    cout << "Isosceles";
  } else if (a == 90 || b == 90 || c == 90) {
    cout << "Right";
  } else {
    cout << "Scalene";
  }
  return 0;
}